fix: return exact row counts from inspect

[cloudyun888]

Summary

• make datasette inspect bypass the 10,001-row display count limit when collecting table counts
• add a regression test covering a table with 10,002 rows

Testing

• PYTHONPATH=. pytest tests/test_cli.py -k inspect_cli -q
• PYTHONPATH=. python -m py_compile datasette/cli.py tests/test_cli.py
• manual reproduction with a temporary SQLite database confirms datasette inspect now returns 10002 instead of 10001

Fixes #2485

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📚 Documentation preview 📚: https://datasette--2700.org.readthedocs.build/en/2700/